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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package java.nio; | |
| 27 | + | |
| 28 | + | |
| 29 | +// ## If the sequence is a string, use reflection to share its array | |
| 30 | + | |
| 31 | +class StringCharBuffer // package-private | |
| 32 | + extends CharBuffer | |
| 33 | +{ | |
| 34 | + CharSequence str; | |
| 35 | + | |
| 36 | + StringCharBuffer(CharSequence s, int start, int end) { // package-private | |
| 37 | + super(-1, start, end, s.length()); | |
| 38 | + int n = s.length(); | |
| 39 | + if ((start < 0) || (start > n) || (end < start) || (end > n)) | |
| 40 | + throw new IndexOutOfBoundsException(); | |
| 41 | + str = s; | |
| 42 | + } | |
| 43 | + | |
| 44 | + public CharBuffer slice() { | |
| 45 | + return new StringCharBuffer(str, | |
| 46 | + -1, | |
| 47 | + 0, | |
| 48 | + this.remaining(), | |
| 49 | + this.remaining(), | |
| 50 | + offset + this.position()); | |
| 51 | + } | |
| 52 | + | |
| 53 | + private StringCharBuffer(CharSequence s, | |
| 54 | + int mark, | |
| 55 | + int pos, | |
| 56 | + int limit, | |
| 57 | + int cap, | |
| 58 | + int offset) { | |
| 59 | + super(mark, pos, limit, cap, null, offset); | |
| 60 | + str = s; | |
| 61 | + } | |
| 62 | + | |
| 63 | + public CharBuffer duplicate() { | |
| 64 | + return new StringCharBuffer(str, markValue(), | |
| 65 | + position(), limit(), capacity(), offset); | |
| 66 | + } | |
| 67 | + | |
| 68 | + public CharBuffer asReadOnlyBuffer() { | |
| 69 | + return duplicate(); | |
| 70 | + } | |
| 71 | + | |
| 72 | + public final char get() { | |
| 73 | + return str.charAt(nextGetIndex() + offset); | |
| 74 | + } | |
| 75 | + | |
| 76 | + public final char get(int index) { | |
| 77 | + return str.charAt(checkIndex(index) + offset); | |
| 78 | + } | |
| 79 | + | |
| 80 | + // ## Override bulk get methods for better performance | |
| 81 | + | |
| 82 | + public final CharBuffer put(char c) { | |
| 83 | + throw new ReadOnlyBufferException(); | |
| 84 | + } | |
| 85 | + | |
| 86 | + public final CharBuffer put(int index, char c) { | |
| 87 | + throw new ReadOnlyBufferException(); | |
| 88 | + } | |
| 89 | + | |
| 90 | + public final CharBuffer compact() { | |
| 91 | + throw new ReadOnlyBufferException(); | |
| 92 | + } | |
| 93 | + | |
| 94 | + public final boolean isReadOnly() { | |
| 95 | + return true; | |
| 96 | + } | |
| 97 | + | |
| 98 | + final String toString(int start, int end) { | |
| 99 | + return str.toString().substring(start + offset, end + offset); | |
| 100 | + } | |
| 101 | + | |
| 102 | + public final CharBuffer subSequence(int start, int end) { | |
| 103 | + try { | |
| 104 | + int pos = position(); | |
| 105 | + return new StringCharBuffer(str, | |
| 106 | + -1, | |
| 107 | + pos + checkIndex(start, pos), | |
| 108 | + pos + checkIndex(end, pos), | |
| 109 | + capacity(), | |
| 110 | + offset); | |
| 111 | + } catch (IllegalArgumentException x) { | |
| 112 | + throw new IndexOutOfBoundsException(); | |
| 113 | + } | |
| 114 | + } | |
| 115 | + | |
| 116 | + public boolean isDirect() { | |
| 117 | + return false; | |
| 118 | + } | |
| 119 | + | |
| 120 | + public ByteOrder order() { | |
| 121 | + return ByteOrder.nativeOrder(); | |
| 122 | + } | |
| 123 | + | |
| 124 | +} | |